nuttx/tools/Rust.defs

############################################################################
# tools/Rust.defs
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.  The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################

RUSTC := rustc --edition 2021

RUSTFLAGS :=

ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
  RUSTFLAGS += -g
endif

ifeq ($(CONFIG_DEBUG_NOOPT),y)
  RUSTFLAGS += -C opt-level=0
endif

# Special handling for the SIM

ifeq ($(CONFIG_ARCH_SIM),y)
  ifeq ($(CONFIG_HOST_LINUX),y)
    ifeq ($(LLVM_ARCHTYPE),x86)
      # Only for x86 based host or x64 but m32 build
      RUSTFLAGS += --target i686-unknown-linux-$(LLVM_ABITYPE)
    else
      # For other archs, such as aarch64, arm etc
      RUSTFLAGS += --target $(LLVM_ARCHTYPE)-unknown-linux-$(LLVM_ABITYPE)
    endif
  else ifeq ($(CONFIG_HOST_MACOS),y)
    RUSTFLAGS += --target $(LLVM_ARCHTYPE)-apple-$(LLVM_ABITYPE)
  endif
else ifeq ($(CONFIG_ARCH_RISCV),y)
  # Target triple is riscv[32|64][isa]-unknown-none-elf
  # "imafdc" becomes "gc"

  ifeq ($(CONFIG_ARCH_RV_ISA_M)$(CONFIG_ARCH_RV_ISA_A)$(CONFIG_ARCH_FPU)$(CONFIG_ARCH_DPFPU)$(CONFIG_ARCH_RV_ISA_C),yyyyy)
    RUST_ARCHTYPE = $(LLVM_ARCHTYPE)gc
  else
    RUST_ARCHTYPE = $(LLVM_ARCHTYPE)i
    ifeq ($(CONFIG_ARCH_RV_ISA_M),y)
      RUST_ARCHTYPE := $(RUST_ARCHTYPE)m
    endif
    ifeq ($(CONFIG_ARCH_RV_ISA_A),y)
      RUST_ARCHTYPE := $(RUST_ARCHTYPE)a
    endif
    ifeq ($(CONFIG_ARCH_FPU),y)
      RUST_ARCHTYPE := $(RUST_ARCHTYPE)f
    endif
    ifeq ($(CONFIG_ARCH_DPFPU),y)
      RUST_ARCHTYPE := $(RUST_ARCHTYPE)d
    endif
    ifeq ($(CONFIG_ARCH_RV_ISA_C),y)
      RUST_ARCHTYPE := $(RUST_ARCHTYPE)c
    endif
  endif

  RUSTFLAGS += --target $(RUST_ARCHTYPE)-unknown-none-elf
else
  # For arm, but there are some other archs not support yet,
  # such as xtensa, x86 bare metal, etc.
  RUSTFLAGS += --target $(LLVM_ARCHTYPE)-none-$(LLVM_ABITYPE)
endif